This property, which is known as dichroism, is particularly strong in tourmaline.

此种特性称为二向色性, 尤其是在电气石中表现得特别强烈.

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Discusses the of natural tourmaline material & technology used in air filtration field.

讨论天然电气石负离子材料 与 技术在空气过滤领域的应用前景.

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The natural tourmalines'color is diversity and its genesis is complexity.

天然电气石颜色多种多样,颜色成因非常复杂.

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Boron compounds are found widely dispersed as various minerals, including borax and the gemstone tourmaline.

非天然生成,一般以化合态分散在各种矿物中, 如存在于硼砂和电气石内.

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Photo Gallery : Minerals A starburst or red tourmaline stands out against its white surroundings.

矿物质图片画廊.星放射状或红色电气石的出现依靠它的周围白色环境.

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Tourmaline is a semi - precious stone and mineral that emits negative ions and far - infrared rays ( FIR ) .

电气石 在矿产中是一种次级的宝石,它可以放射负离子和远红外线.

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Based on wet - classification, the paper introduces the deduction of the particle - size formula by centrifugal separation theory.

提出湿法分级超细功能负离子电气石的方法.采用离心沉降方法, 运用离心分级原理推出分级粒径公式.

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